a) $$\frac{7}{20} = \frac{7 \cdot 5}{20 \cdot 5} = \frac{35}{100} = 0,35$$
б) $$\frac{9}{80} = \frac{9}{8 \cdot 10} = \frac{9 \cdot 125}{8 \cdot 125 \cdot 10} = \frac{1125}{10000} = 0,1125$$
в) $$\frac{13}{800} = \frac{13}{8 \cdot 100} = \frac{13 \cdot 125}{8 \cdot 125 \cdot 100} = \frac{1625}{100000} = 0,01625$$
г) $$\frac{24}{192} = \frac{1}{8} = 0,125$$
д) $$\frac{28}{224} = \frac{1}{8} = 0,125$$
e) $$\frac{49}{392} = \frac{7 \cdot 7}{7 \cdot 56} = \frac{7}{56} = \frac{1}{8} = 0,125$$
**Ответы:**
a) **0,35**
б) **0,1125**
в) **0,01625**
г) **0,125**
д) **0,125**
e) **0,125**